Unless the mooring ball has a pick-up pennant attached to the mooring line, a boat hook is essentially all you need to snag a mooring. It certainly helps to have crew at the foredeck, guiding you with hand signals until right upon it - at which time, you reverse the engine, or luff the sails.

I've picked moorings up when singlehanded, by steering the boat alongside the mooring - reversing enough to counter current, wind and boat momentum, then snagging with my boat hook. It's simple, but as with everything sail related, just takes a little practice.